Update request version to avoid npm warn

[arzafran]

Background

request 2.78.0 uses deprecated node-uuid, it has been updated in version 2.79.0 to use uuid package, an unwanted warn is shown in the console when npm installing node-sass

Changes done

bump request dependency version to 2.79.0

[nschonni]

Because of the ^, that is the version that should be installed anyway. I do understand trying to bump it up though to avoid a known issue

[arzafran]

@nschonni It should work like that, but in several environments at my office we had this warn shown because of old dependency being installed when doing an npm install and it's a really minor change that would solve the issue

[danez]

It can sometimes happen that an other dependency depends on request version <2.79 && >2.61. And if this dependency gets resolved before node-sass, npm will use the older version of request also for node-sass as it also satisfies the dependency ^2.61

[xzyfer]

Apologies, I've been away. I agree with @nschonni that this isn't technically necessary but I also see how much people react to these messages - fsevents/fsevents#163

Thanks @arzafran